My reply is at the bottom of your message :
The One said:
Whenever I click on any installation program (even tried Winamp Lite, Winamp
Full, and other software installation programs), nothing happens. The cursor
turns into a hourglass for a split second and thats it!
How do I fix it?
Thanks in advance.
You can first goto Windows Update site and check you have all latest updates
and Windows Installer the latest version is 3.1
Then , you can do a Repair of your Windows.First make sure your computer is
malware free checking with antivirus and antispyware.Then you could try
running the System File Checker (sfc.exe),
this will scan all protected Windows files to verify their versions have not
been overwritten or damaged,
and if so will replace the compromised version with a fresh copy.
To run it, click Start->Run and type
sfc.exe /scannow
Make sure you keep handy your Windows CD/Recovery CD which you received when
you bought your
Windows / computer because you'll need it to do the repair.
Panda_man